EP0839918A1 - Procédé et dispositif pour refroidir un objet - Google Patents

Procédé et dispositif pour refroidir un objet Download PDF

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Publication number
EP0839918A1
EP0839918A1 EP96810731A EP96810731A EP0839918A1 EP 0839918 A1 EP0839918 A1 EP 0839918A1 EP 96810731 A EP96810731 A EP 96810731A EP 96810731 A EP96810731 A EP 96810731A EP 0839918 A1 EP0839918 A1 EP 0839918A1
Authority
EP
European Patent Office
Prior art keywords
coolant
cooling
jets
microchannels
grooves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96810731A
Other languages
German (de)
English (en)
Other versions
EP0839918B1 (fr
Inventor
Miroslaw Plata
Claude-Alain Rolle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
Alusuisse Technology and Management Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alusuisse Lonza Services Ltd, Alusuisse Technology and Management Ltd filed Critical Alusuisse Lonza Services Ltd
Priority to DE59608802T priority Critical patent/DE59608802D1/de
Priority to AT96810731T priority patent/ATE213785T1/de
Priority to EP96810731A priority patent/EP0839918B1/fr
Priority to AU40986/97A priority patent/AU722395B2/en
Priority to ZA9709364A priority patent/ZA979364B/xx
Priority to CA002218781A priority patent/CA2218781C/fr
Priority to US08/955,286 priority patent/US5902543A/en
Priority to NO19975000A priority patent/NO319260B1/no
Priority to JP30180597A priority patent/JP3984339B2/ja
Publication of EP0839918A1 publication Critical patent/EP0839918A1/fr
Application granted granted Critical
Publication of EP0839918B1 publication Critical patent/EP0839918B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching

Definitions

  • the invention relates to a method for cooling an object by applying a liquid coolant to the surface of the object in the form of continuous coolant jets.
  • the scope of the invention also includes a device suitable for carrying out the method and an application of the method or use of the device.
  • the metal When cooling pressed profiles and hot-rolled strips made of an aluminum alloy from the pressing or hot rolling temperature, the metal must be from 450 to 480 ° C in the shortest possible time to less than 300 ° C, in many cases up to 100 ° C, be cooled.
  • EP-A-0578607 discloses an inline method for cooling profiles emerging from an extrusion press, in which the spray nozzles known from EP-A-0343103 are installed in modules.
  • EP-A-0695590 discloses a method and a device for cooling hot-rolled plates and strips made of an aluminum alloy, wherein cut-to-length plates or strips continuously pass through a cooling station and water is directly applied to them via flat jet nozzles.
  • the water jet is additionally periodically deflected by means of air or water jets such that the water jet hitting the surface of the plate or belt carries out a wiping movement.
  • the use of flat jet nozzles results in a narrow impact surface with high heat transfer when the water jet hits the surface of the plate or belt. This locally high heat transfer, together with the wiping movement, leads to even heat removal.
  • the heat removal is too low, for example, to cool hot rolled strips made of an aluminum alloy to a temperature of less than 300 ° C. over a short distance, ie in a very short time, after the last stitch before the reeling.
  • the invention is therefore based on the object of providing a method and a device of the type mentioned at the outset with which the cooling capacity can be further increased compared to known methods and devices.
  • the object is achieved in that the delivery rate of each coolant jet is set in such a way that the coolant hitting the surface completely evaporates.
  • the complete evaporation prevents the formation of a water film that inhibits heat extraction.
  • coolant There is no local accumulation of coolant, which can lead to an uncontrolled cooling and thus to different mechanical properties near the surface of the object.
  • Such differences in the mechanical properties can have a disruptive effect on the surface quality, for example, in a later forming operation due to a locally different forming behavior.
  • the method according to the invention is particularly suitable for all areas of application where there is an explosive evaporation of coolant can have a negative or even dangerous effect.
  • the cooling capacity can be optimally controlled, which enables the generation of precise and reproducible cooling conditions.
  • the coolant is applied to achieve an optimal cooling performance via a large number of small-diameter coolant jets distributed over the surface to be cooled.
  • Each coolant jet preferably has a diameter of 20 to 200 ⁇ m, in particular 30 to 100 ⁇ m.
  • the distance between the points of impact of adjacent coolant jets on the surface is preferably 2 to 10 mm, in particular approximately 3 to 5 mm.
  • a maximum cooling performance results with a laminar flow of the coolant jets.
  • the temperature of the coolant is therefore preferably at most 50 ° C., in particular at most 10 ° C., lower than the boiling point of the coolant. Water is preferably used as the coolant for aluminum alloys.
  • the object to be cooled is expediently moved transversely to the jet direction of the coolant.
  • this is preferably done by oscillation or vibration, in the case of inline cooling by continuous displacement of the object to be cooled.
  • the coolant jets or the cooling device can also be moved relative to the object by oscillation or vibration.
  • a device suitable for carrying out the method according to the invention comprises a plurality of nozzles for applying the individual coolant jets to the surface of the object.
  • Each nozzle has a diameter of 20 to 200 ⁇ m, preferably 30 to 100 ⁇ m.
  • the nozzles are designed as microchannels in a carrier made of graphite, ceramic, glass, metal or plastic.
  • the carrier is formed by a stack composed of sheet-like elements, the surfaces of the elements serving as stacking surfaces abutting one another in a fluid-tight manner.
  • Grooves for forming the microchannels are arranged in at least one of the mutually facing surfaces of adjacent elements in such a way that cooling liquid can enter on one side of the microchannels formed by the grooves and exit on the other side of the microchannels.
  • the elements are preferably designed as plates with plane-parallel surfaces and have at least one opening for supplying the cooling liquid to the microchannels.
  • the grooves connect the opening to the outer edge of the preferably annular plates.
  • the grooves have a width and a depth of 20 to 200 ⁇ m, preferably 30 to 100 ⁇ m.
  • the individual elements have a thickness of 2 to 10 mm, preferably 3 to 5 mm.
  • a preferred application of the method according to the invention and of the device is seen in the continuous cooling of a hot-rolled strip made of an aluminum alloy.
  • the high cooling capacity of the method according to the invention makes it possible to arrange a small and at the same time powerful cooling unit in the often only limited space between the rolling mill and the reel device.
  • the method and the device according to the invention can also be used ideally for applying a thin layer of release agent to the still hot surface of a casting mold.
  • the release agent is added to the coolant. Since the coolant evaporates completely when it hits the hot surface, the release agent is applied extremely evenly.
  • the cooling nozzles can be mounted in a conventional manner on a tree for applying release agent to the mold surface of a die casting mold, which is inserted between the mold halves of the opened mold after demolding.
  • a nozzle module has a tubular support 10 with a central supply channel 12 for supplying a coolant to microchannels or nozzles 14.
  • the microchannels 14 connect the central feed channel 12 to the surface of the carrier 10.
  • the coolant exits through the microchannels 14 in the form of individual coolant jets 16 and strikes the hot surface 20 of an object 18, for example a hot-rolled strip made of an aluminum alloy, essentially at right angles.
  • an object for example a hot-rolled strip made of an aluminum alloy, essentially at right angles.
  • T k in the feed channel 12 is, for example, approximately 90 ° C., ie it is approximately 10 ° C. below the boiling temperature T s of water.
  • the length 1 of the microchannels 14 is for example 10 mm and the diameter c of the channels is e.g. at 50 ⁇ m.
  • the distance between the points of impact of the coolant jets 16 on the surface 20 of the object 18 is e.g. 3 mm.
  • the dimensions of the microchannels 14 or the coolant jets 16 are selected such that the coolant jets 16 completely change into coolant vapor 22 when they strike the surface 20 of the hot object 18.
  • the nozzle module shown in FIGS. 2 to 4 consists of individual annular plates 32 made of, for example, aluminum oxide ceramic with plane-parallel polished surfaces 34 with a small degree of roughness. Grooves 40 extending radially from the central opening 36 to the outer edge 38 of the plate 32 are arranged in each of the surfaces 34. The grooves have a width b and a depth t of 50 ⁇ m, for example.
  • the individual plates 32 having a thickness e of, for example, 3 mm are lined up to form a stack 30 fixed between two end plates 42. One of the two end plates 42 is provided with a coolant inlet opening 44, which opens into a coolant channel 46 of the stack 30 formed from the central opening 36 of the individual plates 32.
  • the individual platelets 32 are rectangular and have a plurality of central openings 36, from which the grooves 40 machined in each of the surfaces 34 likewise run to the edge 38 of the platelet 32.
  • a single elongated opening can also be provided instead of individual central openings 36.
  • a plurality of nozzle modules or stacks 30 are arranged parallel to one another in a coolant station for cooling a hot-rolled strip 50 made of an aluminum alloy.
  • the individual nozzle modules or stacks 30 are connected to a coolant supply line 48.
  • the cooling surface covered by the coolant jets 16 on the belt 50 is approximately 2 m 2 with a bandwidth of 2 m and a length of the cooling station of 1 m.
  • the total number of microchannels 14 in such an order is approximately 200,000.
  • the coolant can be applied to one or both surfaces of the belt 50.
  • Curves A and B clearly show the high cooling capacity of the method according to the invention.
  • the cooling rates achieved were 50 ° C / sec (curve A) and 200 ° C / sec (curve B).
  • the cooling rates for the specimen used here are between about 5 and 15 ° C./sec with conventional cooling.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Continuous Casting (AREA)
  • Extrusion Of Metal (AREA)
  • Nozzles (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP96810731A 1996-11-01 1996-11-01 Procédé et dispositif pour refroidir un objet Expired - Lifetime EP0839918B1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DE59608802T DE59608802D1 (de) 1996-11-01 1996-11-01 Verfahren und Vorrichtung zum Kühlen eines Gegenstandes
AT96810731T ATE213785T1 (de) 1996-11-01 1996-11-01 Verfahren und vorrichtung zum kühlen eines gegenstandes
EP96810731A EP0839918B1 (fr) 1996-11-01 1996-11-01 Procédé et dispositif pour refroidir un objet
AU40986/97A AU722395B2 (en) 1996-11-01 1997-10-15 Process and device for cooling an article
ZA9709364A ZA979364B (en) 1996-11-01 1997-10-20 Process and device for cooling an article.
CA002218781A CA2218781C (fr) 1996-11-01 1997-10-21 Procede et dispositif pour refroidir un objet
US08/955,286 US5902543A (en) 1996-11-01 1997-10-21 Process and device for cooling an article
NO19975000A NO319260B1 (no) 1996-11-01 1997-10-30 Fremgangsmate og anordning for kjoling av en gjenstand, og anvendelse av anordningen.
JP30180597A JP3984339B2 (ja) 1996-11-01 1997-11-04 物品を冷却する方法及び装置並びにその使用方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96810731A EP0839918B1 (fr) 1996-11-01 1996-11-01 Procédé et dispositif pour refroidir un objet

Publications (2)

Publication Number Publication Date
EP0839918A1 true EP0839918A1 (fr) 1998-05-06
EP0839918B1 EP0839918B1 (fr) 2002-02-27

Family

ID=8225741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810731A Expired - Lifetime EP0839918B1 (fr) 1996-11-01 1996-11-01 Procédé et dispositif pour refroidir un objet

Country Status (9)

Country Link
US (1) US5902543A (fr)
EP (1) EP0839918B1 (fr)
JP (1) JP3984339B2 (fr)
AT (1) ATE213785T1 (fr)
AU (1) AU722395B2 (fr)
CA (1) CA2218781C (fr)
DE (1) DE59608802D1 (fr)
NO (1) NO319260B1 (fr)
ZA (1) ZA979364B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10207584A1 (de) * 2002-02-22 2003-09-11 Vits Maschb Gmbh I Ins Verfahren zum Abkühlen von Bändern oder Platten aus Metall und Kühlvorrichtung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2085489A1 (fr) * 2008-02-02 2009-08-05 Novaltec Sàrl Système de microjet de fluides
FR2942629B1 (fr) * 2009-03-02 2011-11-04 Cmi Thermline Services Procede de refroidissement d'une bande metallique circulant dans une section de refroidissement d'une ligne de traitement thermique en continu, et installation de mise en oeuvre dudit procede
EP3067652B1 (fr) * 2015-03-11 2019-11-13 Politechnika Gdanska Échangeur de chaleur et procédé d'échange de chaleur
CN115007824A (zh) * 2022-05-11 2022-09-06 福建圣力智能工业科技股份有限公司 一种水平连铸机用水冷装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE955042C (de) * 1953-08-02 1956-12-27 Friedrichshuette Ag Verfahren und Vorrichtung zum Abkuehlen von warmgewalztem, flachem Walzgut
DE1214186B (de) * 1956-09-05 1966-04-14 United Steel Companies Ltd Verfahren zum Kuehlen warmgewalzter metallischer Baender oder Bleche
DE1558798B2 (de) * 1967-04-24 1977-03-03 Swiss Aluminium Ltd., Chippis (Schweiz) Verfahren zur kuehlung von eine temperatur von ueber 371 grad c aufweisenden formkoerpern aus kupfer, aluminium oder legierungen dieser metalle
DE2102614B2 (de) * 1970-01-20 1977-10-27 Koninklijke Hoogovens En Staal Vorrichtung zum kuehlen eines sich waagerecht bewegenden metallstreifens
SU619524A1 (ru) * 1976-08-17 1978-08-15 Институт черной металлургии Способ охлаждени проката
DE2456079B2 (de) * 1973-11-28 1979-07-19 Nippon Kokan K.K., Tokio Verfahren zum Kühlen heißer Gegenstände
EP0343103A1 (fr) 1988-05-19 1989-11-23 Alusuisse-Lonza Services Ag Procédé et dispositif pour refroidir un objet
EP0429394A1 (fr) 1989-11-23 1991-05-29 ALUSUISSE-LONZA SERVICES Ltd. Refroidissement de cordes coulées
EP0578607A1 (fr) 1992-06-19 1994-01-12 Alusuisse-Lonza Services Ag Dispositif de pulvérisation pour le refroidissement de profilés
EP0695590A1 (fr) 1994-07-20 1996-02-07 Alusuisse-Lonza Services AG Procédé et dispositif de refroidissement des tÔles et des bandes laminées à chaud

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035865A (en) * 1958-11-21 1962-05-22 James A Sokaly Head rest for hair dryers
US4407487A (en) * 1980-01-15 1983-10-04 Heurtey Metallurgie Device for cooling metal articles
US4882107A (en) * 1988-11-23 1989-11-21 Union Carbide Chemicals And Plastics Company Inc. Mold release coating process and apparatus using a supercritical fluid
US5076344A (en) * 1989-03-07 1991-12-31 Aluminum Company Of America Die-casting process and equipment

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE955042C (de) * 1953-08-02 1956-12-27 Friedrichshuette Ag Verfahren und Vorrichtung zum Abkuehlen von warmgewalztem, flachem Walzgut
DE1214186B (de) * 1956-09-05 1966-04-14 United Steel Companies Ltd Verfahren zum Kuehlen warmgewalzter metallischer Baender oder Bleche
DE1558798B2 (de) * 1967-04-24 1977-03-03 Swiss Aluminium Ltd., Chippis (Schweiz) Verfahren zur kuehlung von eine temperatur von ueber 371 grad c aufweisenden formkoerpern aus kupfer, aluminium oder legierungen dieser metalle
DE2102614B2 (de) * 1970-01-20 1977-10-27 Koninklijke Hoogovens En Staal Vorrichtung zum kuehlen eines sich waagerecht bewegenden metallstreifens
DE2456079B2 (de) * 1973-11-28 1979-07-19 Nippon Kokan K.K., Tokio Verfahren zum Kühlen heißer Gegenstände
SU619524A1 (ru) * 1976-08-17 1978-08-15 Институт черной металлургии Способ охлаждени проката
EP0343103A1 (fr) 1988-05-19 1989-11-23 Alusuisse-Lonza Services Ag Procédé et dispositif pour refroidir un objet
EP0429394A1 (fr) 1989-11-23 1991-05-29 ALUSUISSE-LONZA SERVICES Ltd. Refroidissement de cordes coulées
EP0578607A1 (fr) 1992-06-19 1994-01-12 Alusuisse-Lonza Services Ag Dispositif de pulvérisation pour le refroidissement de profilés
EP0695590A1 (fr) 1994-07-20 1996-02-07 Alusuisse-Lonza Services AG Procédé et dispositif de refroidissement des tÔles et des bandes laminées à chaud

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED Section Ch Week 7924, Derwent World Patents Index; Class M21, AN 79-45397B, XP002028907 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10207584A1 (de) * 2002-02-22 2003-09-11 Vits Maschb Gmbh I Ins Verfahren zum Abkühlen von Bändern oder Platten aus Metall und Kühlvorrichtung

Also Published As

Publication number Publication date
AU722395B2 (en) 2000-08-03
CA2218781A1 (fr) 1998-05-01
CA2218781C (fr) 2006-10-03
JP3984339B2 (ja) 2007-10-03
NO975000L (no) 1998-05-04
AU4098697A (en) 1998-05-07
ATE213785T1 (de) 2002-03-15
US5902543A (en) 1999-05-11
NO975000D0 (no) 1997-10-30
EP0839918B1 (fr) 2002-02-27
JPH10156427A (ja) 1998-06-16
NO319260B1 (no) 2005-07-11
DE59608802D1 (de) 2002-04-04
ZA979364B (en) 1998-05-12

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